It seems to be but I have only seen the first few episodes. The live action show that was on tnt about 5 years back was
much much better, as is the topcow comic as well but the anime and manga versions are not bad by any means.

I enjoy the comic book from TopCow more, but it is cool that they turned it into an anime! I loved the comic. I still
have the very first issue first edition ;) in perfect condition....lol gathering dust in a box in my closet :P

The plot is nothing great, just slightly above average. The series' main strong points are the fight scenes, especially
towards the last few eps, and the fanservice. Get the DVD release/subs, they censor less .